PROCESS FOR CORROSION-PROOFING METALLIC SUBSTRATES
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United States of America Patent
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Issued Date -
Apr 22, 2010
app pub date -
Dec 13, 2007
filing date -
Mar 15, 2007
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Abandoned
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Abstract
The invention relates to a process for corrosion-proofing metallic substrates that involves in a first stage (I) coating the substrate by electroless immersion into an aqueous bath of an anticorrosion agent K1 with a pH of between 1 and 5, comprising at least one compound having as its cation a lanthanide metal and/or a d-block element metal, bar chromium, and/or having as its anion a d-block element metallate, bar chromium-containing metallates, and at least one oxidation-capable acid, bar phosphorus and/or chromium acids, a conversion being effected on the substrate surface, and in a concluding stage (III) carrying out further coating by deposition of a cathodic electrocoat material.
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